Machine for milling lumber and the like



May 24, 1927.

1,629,742 R. w. SCOTT MACHINE FOR MILLING LUMBER AND THE LIKE Filed Aug. 18. 1924 IN VEN TOR.

Way

Patented May 24, 1927.

UNITED STATES PATENT OFFICE.

RAY W. SCOTT, OF LOS ANGELES, CALIFORNIA, ASSIGNOR 0F ONE-I-IALF TO RADIO LAB. & MFG. 00., A. COMMON-LAW TRUST ASSOCIATION OF CALIFORNIA, AND ONE- HALF TO LEON Hi SCOTT, 0F PASADENA, CALIFORNIA.

MACHINE FOR MILLING LUMBER AND THE LIKE.

Application filed August 18, 1924.

The object of my invention is to provide a suitable machine for the manufacture of a perforated board preferably of wood by cutting a plurality of holes therein at a high rate of speed facilitating intense manufacture and producing a perforated lath or sheeting board for plastered walls in substitution for the ordinary lath.

A further purpose of the machine is to manufacture such perforated boards with perforations having tapered walls forming larger openings on one side and smaller openings on the other. When the boards are nailed upon a wall to be plastered, such perforations, or apertures, thus being adaptable to form keys for the securing of the plaster to the walls or other uses to which such perforated boards may apply.

The introduction of metal lath and plaster boards have made great inroads into the lumber business so far as the ordinary lath is concerned, and such a product as my machine would reestablish upon a competitive basis a wooden material for this purose. My invention thus overcomes the ob- ]ection to old-fashioned lath and has many advantages over all substitutes inasmuch as it adds great strength to the building, can be nailed in place by anyone without the aid of a skilled lather, requires less mortar to construct a plastered wall and has many other advantages. Other objects and advantages of my invention are particularly cited in the following description and indicated in the appendant claims.

In pursuance of the mentioned objects, I have. utilized in my machine, a principle involving the perforating of boards by means of circular saws or grubs, these being preferably carried by and disposed partly within a cylinder, turning with the same while simultaneously rotating about their own spindles, planetary fashion,such rotation being adapted to a function effectively to cut. the. said perforations as each board is fed through and between pairs of the cylinders,the rotating saws being in all .cases successively carried to and from operative positions by automatic or cyclical movements in planes substantially perpendicular to the sawed surfaces of said boards and parallel with the direction of advance of said boards.

Serial No. 732,629.

My invention is illustrated by the accompanying drawings, which, with their reference numerals, form apart of this specification. Like reference numerals indicate like parts in all of the drawin s.

Figure 1 is a side elevation diagrammatically showing a wood-working or milling machine embodying my invention.

Figure 2 is a partial top plan View, on an enlarged scale. I

Figure 3 is a vertical sectional detail view, corresponding to the central portion of Fig. 1, and showing the manner in which perforating saws may be so mountedin the cylinders as to protrude through. the periphery thereof.

Figure 4% is a detail showing gears by which the shafts carrying the mentioned,

cylinders may be synchronously rotated. Figure 5 is a schematic illustration of an alternative form hereinafter referredto.

In Figure 1, I show a substantial frame 1, carrying feed rollers 52, which are adapted to hold a board 3 frame, at the same time forcing the board 3 forward and advancingit'alongatable above and below which I 'may'dispose milling or perforating cylinders 4. These' cylinders may have the same peripheral speed as the mentioned board, forcing the same onward and into engagement with independently driven saws hereinafter mentioned, suitable driving means [being 'provided, as later described, for maintaining the proper rotation of the mentioned cylinders and rollers during the rotation of the saw spindles 5 within said cylinders,'the mentioned construction being such as to apply power to the saws, for the cutting of slots in the board, during its advance. I

In Figure 2, I have shown a. portion of the frame 1, the board 2', and. the upper cylinder 4,. the latter being carried. on a shaft which rotates in bearings 7; and I also show driving pulleys 8 of the saw spindles. 5 and one pf'a pair of intern-lesbmg gears 9, the'u'ppermos't of thesegears engaging a like gear: on the shaft of the down upon the top of said cylinders being provided with complemen tary saws which are adapted to operate on opposite sides of a board, during its pass between said cylinders, or their equivalent-z In a machine provided with a sin-'1"; -ing head, as shown at 10. Figure 1, any desired number of pressure teed rollers may be so used as to press the boa rd -3 down against the top of the frame 1 and into contact with said surfacing head; and the nun-hint: may be provided with other mlard rutting heads, for forming any special contour the board.

Power from a suitable source may be ap plied to the shaft 11, upon which is shown n'iou'nted a pulley 12 of sufficient width to carry the various belts for driving a pulley l3 and also the feed rollers Z; and any surfacing head 10 may be driven in the direc tion suggested by the arrow on the pulley 12. Carried in suitable hearings on the frame 1 are shown shafts 14-, supporting the mentioned perforating cylinders l. The cylinders t are geared together by the tiin ing gears 9 (Figure 2 and Fig. t), so as to establish a perfect alternation (it perform tions within the board from above and be low. somewhat as best shown in Figure 3, The upper cylinder Fl may be driven from the shaftof the feed roller :2 by means of the chain belt 15 and suitable sprockets, and the lower cylinder t may be driven from the up per cylinder through the timing gear 9. Independently to drive saws 6, or their equivalents, suitable spindles 5 to which the small saws 6 are secured are rotatably mounted within the cylinders 1- in such a way that the saws protrude through the periphery of the cylinder in the proper degree to make the desired cut in the board 3 (Figure 3). Secured to the protruding end of each of the saw spindles 5, are the driving pulleys 8, which may be belted to the pulley 13, one belt in each case passing around the entire circle of pulleys and applying power to the spindles 5 only when the belt contacts with the pulleys. This however, is suflicient. inasmuch as the saw spindles 5 require no power when the saws do not engage the board. The feed rollers 2 are driven in the direction shown by the arrow and are adapted to force the board beneath them and between the cylinders 4 while the cylinders 4 move in the same direction with relation to the board, and at the same time the saws bodily advancing therewith, are driven in dependently at a high cutting speed and in opposite rotation to cylinders 4-. The lower system of pulleys 8 may be driven from the pulley 13 through the' belt 16, the counterpulley 20, and the belt 21.

At the extreme left of Figure l I may provide a band saw wheel 17 adapted, in conjunction with a similar wheel, to carry a band saw shown as driven by the belt 18,

the hand saw traversing horizontally in such a manner as to sever the board longitudinally into resultant boards of undiminished breadth in; it passes through the cylinders 4. Fig. 5, being merely diagrammatic of alternative means for perforating. no band saw is shown therein.

.lt- \viil now be seen that if a board of appr ximately the proper thickness is passed ilnough the machine from the right beneath the teed rolh it. will he forced a ninf t', the urfacing cutter head 10 and if l,-etwcen the [mi'iorating cylinders 4 which in turn grip the board between their peripheral surface and thereby serve also to draw the board forward and force the same against the band saw 19 (Figures 1 and 3). The rotating cutter saws carried by the moving cylinders are brought in contact with the board in the regular path of rotation of the cylinders and as the rotation of the saws shown by the arrow (Figure 3) is against the direction of the board, each will cut itselt into and slightly more. than half way through the board and move out of the'cut as soon as the cylinder passes around in its rotation, the resultant apertures being outwardly divergent, although produced during the uninterrupted advance of the boards at the peripheral speed of the cylinders t. Now the depth ot the saw cut in the board is established by the protrusion of the saws from the cylinders t, so that, when the band saw subdivides the board as shown, the finished product will comprise pairs of like boards perforated through and through with apertures having larger openings on one side of the board than on the other.

\Vhat I claim is:

1. In a machine for milling lumber or the like, the combination of means adapted to force a. board through said machine and independently driven rotating means advancing therewith for perforating the board continuously during its uninterrupted advance, said saw means being etlective automatically to advance and to retract saws in planes parallel with said advance and in such manner as to cut separate outwardly expanding slots in said boards.

2. In a machine for milling lumber or the like, the combination of means adapted to force a. board through said machine and independently driven rotating means advancing therewith for perforating the board continuously during its uninterrupted advance and means for bisecting the board, said saw means being efi'ective automatically to advance and to retract saws in planes substantially perpendicular to the sawed surfaces of said board.

I). In a machine for milling lumber or the like, the combination of means adapted to force a board through said machine; means for Jert'Orating the board during its uninterlit) rupted advance and means for bisecting the board, said perforating means comprising circular saws rotated Within rollers and protruding therefrom and adapted to out their way into the surface of the board; and means for timing the rotations oi said saw-carrying rollers.

4. In a machine of the character described: means for advancing a board; and rotary saw means comprising saws which rotate in planes parallel with the direction of said advance and which are caused cyclically to approach and withdraw in said planes for a simultaneously cutting outwardly divergent openings extending more than half Way therethrough from opposite sides of said board, during its uninterrupted advance.

5.1n a machine of the character described: means for advancing a board; and means comprising rotary saws successively moved to and from operative positions, for cutting outwardly divergent and interrupted openings which extend more than half Way therethrough from opposite sides of said hoard during its uninterrupted advance; and means for so subdividing said board that aid openings extend completely through the resultant hoards.

In testimony thereof, 1 atlix my signature.

RAY W. SCOTT. 

